JP6487751B2 - Rotor and pump device - Google Patents

Description

  The present invention relates to a rotor and a pump device.

  2. Description of the Related Art Conventionally, there has been used a pump device that sends out a liquid by crushing a tube disposed along an arc-shaped inner peripheral surface formed in a casing while revolving a roller. The pump device includes, for example, a housing, a tube disposed in the housing, a motor that rotationally drives the drive shaft, and a rotor having a roller that revolves and presses the tube by rotation of the drive shaft. Yes.

  Patent Document 1 discloses a pump base that holds a rotor having a roller and a motor, a casing that holds a tube along an arcuate inner peripheral surface, and a variable mechanism that changes the relative position of the pump base and the casing. Is disclosed. In the pump device described in Patent Document 1, the position of the rotor is moved by changing the relative position between the pump base and the housing by a variable mechanism, thereby facilitating the attachment / detachment of the tube.

JP 2014-105607 A

  By the way, as a tube arrange | positioned in the housing | casing of a pump apparatus, the tube which has various outer diameters and internal diameters according to the delivery amount etc. of the desired liquid is used. Therefore, it is necessary to adjust the crushing amount of the tube by adjusting the position of the roller according to the outer diameter and inner diameter of the tube.

  However, in the pump device described in Patent Document 1, although the position of the rotor can be changed, it is difficult to adjust the crushing amount of the tube by adjusting the position of the roller.

  The present invention has been made in view of the above, and an object of the present invention is to provide a rotor and a pump device capable of adjusting the crushing amount of the tube by adjusting the position of the roller.

In order to solve the above-described problems and achieve the object, a rotor according to one embodiment of the present invention is a rotor that sends out liquid in the tube by pressing the tube, and rotates around a rotation axis. A body, a plurality of bottom portions attached to the rotating body, a roller that revolves around the rotation axis and presses the tube, a plurality of arm portions attached to each of the plurality of bottom portions, and the rotation A position adjusting means for adjusting a mutual positional relationship between the plurality of bottom portions in a radial direction of rotation of the body, and the position adjusting means can define a plurality of positional relationships at the plurality of bottom portions. and wherein the Rukoto to have a.

  In the rotor according to one aspect of the present invention, the position adjusting unit adjusts a distance from the bottom portion to the rotation shaft in the bottom portion.

  Further, in the rotor according to one aspect of the present invention, the plurality of bottom portions are arranged around the rotation shaft, and the cam mechanism includes a protrusion provided on each of the plurality of bottom portions, A cam operating portion that can move relative to the bottom portion, and the cam operating portion is formed with an elongated hole extending in a direction intersecting the operating direction of the cam operating portion. A protrusion is fitted and the protrusion is guided in the elongated hole.

  In the rotor according to one aspect of the present invention, in the cam mechanism, the elongated hole is formed with at least one operation direction extending portion that extends along the operation direction of the cam operation portion. Features.

  The rotor according to one aspect of the present invention is characterized in that, in the cam mechanism, the position of the protruding portion guided by the elongated hole can be adjusted steplessly.

  The rotor according to one aspect of the present invention includes a fine adjustment mechanism that finely adjusts the position of the cam operation unit.

Also, in the rotor according to one embodiment of the present invention, wherein the roller is disposed in rotational symmetrical positions with respect to the rotation axis.
The rotor according to one aspect of the present invention is characterized in that the two bottom portions are arranged to face each other with the rotation shaft interposed therebetween.

  The rotor according to an aspect of the present invention is characterized in that the rotor includes a biasing unit that biases the roller outward in the radial direction of rotation of the rotating body.

  The rotor according to an aspect of the present invention is characterized in that it includes guide means that enables relative movement of the arm portion with respect to the bottom portion.

  According to another aspect of the present invention, there is provided a pump device including a housing that accommodates the rotor and the tube, the above-described rotor, and a motor that is a driving source for rotation of the rotor.

  ADVANTAGE OF THE INVENTION According to this invention, the pump apparatus which can adjust the crushing amount of a tube by adjusting the position of a roller can be provided.

FIG. 1 is a schematic perspective view showing a main part of a pump device according to a first embodiment of the present invention. FIG. 2 is a schematic explanatory view of the rotor included in the pump device according to the first embodiment of the present invention as viewed from the surface side. FIG. 3 is an exploded perspective view of the rotor included in the pump device according to the first embodiment of the present invention as seen from the surface side. FIG. 4 is a schematic explanatory view of the rotor included in the pump device according to the first embodiment of the present invention as viewed from the back side. FIG. 5 is an exploded perspective view of the rotor included in the pump device according to the first embodiment of the present invention as seen from the back side. FIG. 6 is a schematic explanatory diagram for explaining the operation of the cam mechanism provided in the pump device according to the first embodiment of the present invention. FIG. 7 is a schematic explanatory diagram for explaining the state of the rotor after moving the cam operation unit included in the pump device according to the first embodiment of the present invention. FIG. 8A is a diagram illustrating a first modification of the cam operation unit of the cam mechanism included in the pump device according to the first embodiment of the present invention. FIG. 8B is a diagram illustrating a second modification of the cam operation unit of the cam mechanism included in the pump device according to the first embodiment of the present invention. FIG. 9 is a diagram illustrating a third modification of the cam operation unit of the cam mechanism included in the pump device according to the first embodiment of the present invention. FIG. 10 is a diagram illustrating a first modification of the cam mechanism included in the pump device according to the first embodiment of the present invention. FIG. 11 is a schematic diagram for explaining the operation of the cam mechanism in the first modification. FIG. 12 is a conceptual explanatory diagram of a rotor according to a second embodiment of the present invention. FIG. 13 is a conceptual explanatory diagram of Modification 1 of the rotor according to the second embodiment of the present invention.

  Hereinafter, embodiments of a rotor and a pump device according to the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by the following embodiment. In the drawings, the same or corresponding elements are denoted by the same reference numerals as appropriate, and repeated descriptions are omitted as appropriate.

(First embodiment)
First, the pump device 1 and the rotor 40 according to the first embodiment of the present invention will be described. FIG. 1 is a schematic perspective view showing a main part of a pump device 1 according to the first embodiment of the present invention. 1 shows the pump device 1 in a state where the upper lid of the housing 30 is removed. FIG. 2 is a schematic explanatory view of the rotor 40 provided in the pump device 1 according to the first embodiment of the present invention as seen from the front side. In the present embodiment, when viewed from the rotor 40, the side on which the upper lid of the casing 30 of the pump device 1 is attached is referred to as the front side, and the speed reducer 20 side is referred to as the back side. FIG. 3 is an exploded perspective view of the rotor 40 provided in the pump device 1 according to the first embodiment of the present invention as seen from the front side. FIG. 4 is a schematic explanatory view of the rotor 40 included in the pump device 1 according to the first embodiment of the present invention as seen from the back side. FIG. 5 is an exploded perspective view of the rotor 40 provided in the pump device 1 according to the first embodiment of the present invention as seen from the back side.

  The pump device 1 according to the first embodiment of the present invention includes a motor 10, a speed reducer 20, a housing 30, and a rotor 40 accommodated in the housing 30. The pump device 1 is a pump (tube pump) that crushes a tube 31 filled with a liquid by a rotor 40 and delivers the liquid in a predetermined direction. Specifically, the liquid is blood, and the pump device 1 is used for artificial dialysis and the like.

The motor 10 is a driving source that applies a rotational driving force to the rotor 40 via the speed reducer 20, and is driven by, for example, power supplied from a battery, an external power source, or the like, and an instruction from a control circuit. A reduction gear 20 is connected to the rotating shaft 21 of the motor 10.
The speed reducer 20 decelerates and outputs the rotational speed of the power on the input side, and decelerates the rotation from the output shaft of the motor 10 and outputs it to the rotating shaft 21 (output shaft) of the speed reducer 20.
In addition, about the motor 10, a DC motor, a brassless DC motor, a stepping motor etc. are applicable, and the kind is not specifically limited. Moreover, when using a stepping motor, a reduction gear may be unnecessary.

  The housing 30 has a housing space for the tube 31 and the rotor 40 formed therein. The housing 30 has an arc-shaped inner peripheral wall surface 30a, and a recess 30b for guiding the tube 31 outward is formed. The tube 31 is disposed along the inner peripheral wall surface 30a and extends outward through the recess 30b. Further, a through hole is formed on the bottom surface side of the housing 30, and the rotation shaft 21 of the speed reducer 20 projects into the housing 30.

  The rotor 40 is attached to the rotating shaft 21 of the speed reducer 20 and rotates around the rotating shaft 21. That is, the rotating shaft 21 of the speed reducer 20 is the rotating shaft of the rotor 40. The rotor 40 includes a rotating body 50, a plurality of bottom portions 60, a plurality of arm portions 70 having rollers 75, a position adjusting means 80, an elastic member 90, and a guide means 95 (FIG. 2). ~ 5).

  The rotating body 50 includes a holding portion 51 that holds the rotating shaft 21 and a plate-like member 52 that is formed in a plate shape. The holding portion 51 is formed in a cylindrical shape and rotates around the rotation shaft 21 integrally with the rotation shaft 21. Two elongated holes 53 are formed in the plate-like member 52 with the rotating shaft 21 (holding portion 51) interposed therebetween. The elongated hole 53 is formed so as to extend in a direction parallel to a direction connecting the rotation shaft cores of the two rollers 75 arranged to face each other.

  Further, the plate-like member 52 is formed with two long holes 54 for fixing the bottom portions 60 with screws. The elongated hole 54 is also formed so as to extend in a direction parallel to the direction connecting the rotation shaft cores of the two rollers 75, and is formed at a symmetrical position with the rotation shaft 21 (holding portion 51) interposed therebetween. Further, the plate-like member 52 is provided with a fixing portion 55 for attaching a cam operation portion 82 described later.

  The plurality of bottom portions 60 are arranged around the rotation shaft 21. In the first embodiment, the rotor 40 includes two bottom portions 60, and the two bottom portions 60 are disposed to face each other with the rotating shaft 21 (holding portion 51) interposed therebetween (see FIGS. 4 and 5). . Two screw holes 61 and 62 are formed in each bottom portion 60. One screw hole 61 is for fixing to the rotating body 50, and a screw 58 is inserted into a long hole 54 formed in the plate-like member 52 of the rotating body 50 and screwed into the screw hole 61. The bottom part 60 is attached to the rotating body 50. The other screw hole 62 is for attaching the bottom portion 60 to the arm portion 70.

Two protrusions 81 are formed on the surface side of the bottom portion 60. The protruding portion 81 is formed on the side close to the end portion of another bottom portion 60 that is disposed opposite to the protruding portion 81.
Further, on the back surface side of each bottom portion 60, two convex portions 63 for positioning the end portion of the elastic member 90 and two groove portions 64 that are part of the guide means 95 are formed. The groove portion 64 is formed so as to extend in a direction parallel to the direction connecting the rotation shaft cores of the two rollers 75 arranged to face each other.

  The arm part 70 is attached to the bottom part 60 on the outer side in the radial direction of rotation of the rotating body 50, and is attached to the arm part main body 71 and protrudes to the outer side in the radial direction of rotation of the rotating body 50. And a roller 75. The arm portion main body 71 is formed with a long hole 72 that extends on a straight line connecting the rotation axis of the roller 75. The arm 79 is attached to the bottom portion 60 by inserting the screw 79 into the elongated hole 72 and screwing the screw 79 into the screw hole 62 of the bottom portion 60. In addition, by interposing a sleeve between the long hole 72 and the screw 79, the slidability with respect to the bottom portion 60 of the arm portion 70 can be improved, and the relative movement of the arm portion 70 described later with respect to the bottom portion 60 can be improved. It is possible to prevent rattling.

  The arm portion main body 71 is provided with a convex portion 73 for positioning the end portion of the elastic member 90 and a bearing 96 is attached thereto. The arm portion 70 is fixed to the bottom portion 60 with screws 79 with the elastic member 90 sandwiched between the bottom portion 60 and the arm portion 70.

  The roller 75 is attached to the arm portion main body 71 so as to be rotatable around the axis of the roller 75. The roller 75 is disposed at a symmetrical position with respect to the rotation shaft 21, and the rotation shaft 21, the two bottom portions 60, the two arm portion main bodies 71, and the two rollers 75 are disposed on one axis. That is, the revolution shaft of the roller 75 and the rotation shaft of the two rollers are arranged on one axis, and the roller 75 is configured to press perpendicularly to the direction in which the tube 31 extends.

  Here, the rotating body 50 rotates integrally with the rotating shaft 21, and the bottom portion 60 attached to the rotating body 50 also rotates together with the rotating body 50. Furthermore, the arm part main body 71 attached to the bottom part 60 also rotates together with the rotating body 50. Accordingly, the roller 75 attached to the arm portion main body 71 also rotates together. Thereby, the roller 75 revolves around the rotating shaft 21. And it revolves around the rotating shaft 21 so that the tube 31 arrange | positioned at the inner peripheral wall surface 30a of the housing | casing 30 may be crushed, and the liquid in the tube 31 is sent out in a revolving direction.

  The guide means 95 enables relative movement of the arm portion 70 with respect to the bottom portion 60. Specifically, the guide means 95 includes a groove portion 64 formed in the bottom portion 60 and a bearing 96 fitted in the groove portion 64. When the arm part 70 moves relative to the bottom part 60 in the radial direction of rotation of the rotating body 50 (left and right direction in FIG. 4), the bearing 96 rolls along the groove part 64 formed in the bottom part 60, and the arm The movement of the part 70 is guided. In the first embodiment, the groove portion 64 extends in a direction connecting the rotation shaft cores of the two rollers 75, and therefore the position of the roller 75 in the radial direction of the rotation of the rotating body 50 by the distance moved by the guide means 95. Can be changed.

  In addition, the guide means 95 is not limited to what is comprised from the groove part 64 and the bearing 97. FIG. For example, a convex portion may be formed on the arm portion 70, and the convex portion may be engaged with a groove portion formed on the bottom portion 60 to guide relative movement of the arm portion with respect to the bottom portion.

  In addition, in the arm portion 70, a tube guide 76 that restricts the vertical movement of the tube 31 is provided on the radially outer side of the rotation of the rotating body 50.

  The elastic member 90 is for pressing the arm portion 70 outward in the radial direction of the rotating body 50, and is disposed between the convex portion 63 of the bottom portion 60 and the convex portion 73 of the arm portion 70. Two elastic members 90 are provided for each bottom portion 60. The arm portion 70 and the bottom portion 60 are attached to the bottom portion 60 in a state in which the arm portion 70 and the bottom portion 60 are spring-biased by the elastic member 90. The direction in which the spring is urged by the elastic member 90 is a direction connecting the rotation shafts of the two rollers 75 arranged to face each other.

  The position adjusting means 80 adjusts the positional relationship between the plurality of bottom portions 60. In the first embodiment, the position adjusting unit 80 adjusts the positional relationship between the two bottom portions 60 arranged to face each other. More specifically, the position adjusting means 80 adjusts the distance from the bottom portion 60 to the rotating shaft 21 in each bottom portion 60. The position adjusting means 80 has a cam mechanism 80 a that can define a plurality of positional relationships in the plurality of bottom portions 60.

  The cam mechanism 80 a includes a protruding portion 81 provided on each bottom portion 60 and a cam operation portion 82 (cam lever) that can move relative to the bottom portion 60. The cam operation portion 82 is formed with a slide groove 85 extending in a direction perpendicular to the direction connecting the rotation shaft cores of the two rollers 75 arranged to face each other. The fixing portion 55 has a peripheral wall portion 56 that protrudes from the surface of the plate-like member 52 in the direction perpendicular to the surface. A slide groove 85 is fitted on the outer periphery of the peripheral wall portion 56. Further, a screw groove is formed on the inner peripheral surface side of the peripheral wall portion 56. A screw 86 is inserted into the slide groove 85, and the screw 86 is fixed to the fixing portion 55 of the rotating body 50. The screw 86 has a cam operating portion 82 attached to the rotating body 50 so as to be movable in the longitudinal direction of the slide groove 85 with respect to the rotating body 50. The peripheral wall portion 56 can improve the slidability between the cam operation portion 82 and the rotating body 50 and can prevent rattling when the cam operation portion 82 moves.

  The cam operation portion 82 is formed with a long hole 83 extending in a direction intersecting with the moving direction of the cam operation portion 82 (vertical direction in FIG. 2). A projection 81 is fitted in the elongated hole 83. In the first embodiment, the elongated hole 83 is formed in a V shape and is slightly bent in the longitudinal direction (extending direction) of the elongated hole 83. The cam mechanism 80 a adjusts the position of the roller 75 by adjusting the distance between the bottom portion 60 and the rotating shaft 21.

  In the first embodiment, the rotor 40 has a manual rotation operation lever 77 for manually rotating the rotor 40. The tube 31 can be easily attached and detached by manually operating the manual rotation operation lever 77 to rotate the rotor 40.

  Next, in the pump apparatus 1 of 1st Embodiment, the effect | action at the time of operating the cam operation part 82 is demonstrated. FIG. 6 is a schematic explanatory diagram for explaining the operation of the cam mechanism 80a included in the pump device 1 according to the first embodiment of the present invention. In addition, in FIG. 6, the part which the bottom part 60 is hidden by the other member is shown with the dashed-dotted line. FIG. 7 is a schematic explanatory diagram for explaining the state of the rotor 40 after the cam operation unit 82 included in the pump device 1 according to the first embodiment of the present invention is moved from the state shown in FIG. 7 shows a part of the rotor 40 in a state before the cam operation unit 82 is moved.

  As shown in FIG. 6, when the cam operation portion 82 is moved downward, the protrusion 81 is guided by the elongated hole 83, and the bottom portion 60 moves radially inward of the rotation of the rotating body 50. Note that when the cam operation unit 82 is moved, the screw 58 is loosened. Further, since the elongated member 54 is formed in the plate-like member 52, the bottom part 60 can be attached to the rotating body 50 with the screw 58 even if the bottom part 60 moves.

  Here, since the longitudinal direction of the elongated hole 83 of the cam operating portion 82 is a direction intersecting with the moving direction of the cam operating portion 82, the protrusion 81 moves along the elongated hole 83, thereby the bottom portion. The distance between 60 is changed. Accordingly, when the bottom portion 60 moves inward in the radial direction of rotation of the rotating body 50, the roller 75 also moves inward in the radial direction.

  As described above, when the cam operation unit 82 is moved downward, the roller 75 is moved inward by the distance that the projection 81 has moved in the direction connecting the central axes of the two rollers 75 (left and right in FIGS. 6 and 7). Move (see FIGS. 6 and 7). Specifically, the roller 75 moves inward by a distance L shown in FIG.

For example, the position of the roller 75 shown in FIG. 2 is set when the tube 31 has a small diameter (diameter: r1), and the position of the roller 75 shown in FIG. 7 when the tube 31 has a large diameter (diameter: r2). Can be set to
After moving the cam operation portion 82, the screw 58 is screwed into the elongated hole 53 and the screw hole 61, and the bottom portion 60 is fixed to the rotating body 50.
Since the arm portion 70 is attached to the bottom portion 60 with the screw 79, the pressing force of the elastic member 90 does not change even if the position of the roller 75 is adjusted by operating the cam operation portion 82 as described above. .

  According to the pump device 1 and the rotor 40 according to the first embodiment of the present invention configured as described above, the distance from the rotating shaft 21 of each bottom portion 60 is adjusted by operating the cam operation portion 82. The position of the roller 75 can be changed. Thereby, even when the inner diameter and the outer diameter of the tube 31 to be used are changed, the position of the roller 75 is easily adjusted to a desired position by operating the cam operation portion 82, and the crushing amount of the tube is adjusted. be able to. That is, it is possible to apply an appropriate pressing force to the tube 31 by adjusting only the position of the roller 75.

  Here, when the pressing force of the roller is less than the appropriate value, the liquid in the tube cannot be reliably fed in the same direction. In addition, when the tube is applied with a pressing force that is larger than the appropriate value, deterioration of the tube may be accelerated. Therefore, in the rotor 40 and the pump device 1, the position of the roller 75 is adjusted so that the pressing force of the roller 75 to the tube 31 becomes an appropriate pressing force by adopting the above-described configuration.

Further, in the pump device 1 and the rotor 40, since the plurality of rollers 75 can be adjusted at the same time, the time and labor required for the adjustment work can be reduced.
In addition, in the case of a configuration in which each roller is adjusted individually, adjustment variations may occur in the position of each roller. On the other hand, in the rotor 40 of the first embodiment, the cam operation unit 82 is operated, and the positions of the plurality of rollers 75 are determined simultaneously by the positions of the protrusions 81 in the elongated holes 83, thereby preventing adjustment variations. Can do.

Further, an elastic member 90 is provided between the bottom portion 60 and the arm portion 70, and variations in the thickness (outer diameter and inner diameter) of the tube 31 and dimensional variations in the inner peripheral wall surface 30 a of the housing 30. Can be absorbed.
In addition, since the elastic member 90 is provided with the guide means 95 that enables the arm portion 70 and the bottom portion 60 to move relative to each other, it can be moved more precisely in the direction in which the rollers 75 arranged opposite to each other are connected.

  Further, since the roller 75 is disposed at a position symmetrical to the rotation shaft 21 and urges perpendicularly to the direction in which the tube 31 extends, the rotor from the tube 31 side is rotated even if the rotor 40 is rotated forward and backward. The force applied to 40 does not change, and the torque required for rotation of the rotor 40 does not change even when forward and reverse rotations are performed.

  Moreover, since the two bottom parts 60 and the two arm parts 70 are each made the same structure, manufacturing cost can be reduced.

(Variation 1 of the cam operation unit)
Next, Modification Example 1 of the cam operation unit 82 of the cam mechanism 80a included in the pump device 1 according to the first embodiment of the present invention will be described. FIG. 8A is a diagram illustrating a first modification of the cam operation unit 82 of the cam mechanism 80a included in the pump device 1 according to the first embodiment of the present invention.

  As shown in FIG. 8A, the cam operation portion 182 has a long hole shape different from that of the cam operation portion 82 described above. The long hole 183 includes a parallel portion A (operation direction extending portion) extending in a direction parallel to a direction (vertical direction in FIG. 8A) when the cam operation portion 182 is attached to the rotating body 50, and the cam operation portion 182. Crossing portions B extending in a direction intersecting with the operation direction are alternately provided, and the entire long hole extends so as to form a V shape. More specifically, the elongated hole 183 has three parallel portions A extending in a direction parallel to the operation direction of the cam operation portion 182, and a portion extending in a direction crossing the operation direction of the cam operation portion 182. Are formed in two places, and the above-mentioned parallel portions A and intersections B are alternately arranged. With the above-described configuration, two stepped portions 184 are formed in the longitudinal direction of the long hole 183 in the extending direction.

In the cam operation portion 182 configured as described above, a parallel portion A that exists in a direction parallel to the operation direction of the cam operation portion 182 is formed in the elongated hole 183, and a protruding portion is formed on the parallel portion A. When 81 is arranged, the position of the bottom part 60 does not change even if the slide operation part 182 is moved. That is, when the slide operation unit 182 is operated, a section in which the roller 75 is in a desired position becomes long, and a margin can be generated in the operation of the cam operation unit 182. Further, in the case of this slide operation part 182, the elongated hole 183 is formed with three parallel parts A extending in parallel with the operation direction of the cam operation part 182, and therefore the position of the roller 75 in three stages. Can be adjusted. Such a cam operation unit 182 is particularly suitable when a position where the roller 75 is desired to be moved is determined in advance.
In the cam operation unit 182, a groove 185 formed at the center in the longitudinal direction of the cam operation unit 182 is a slide groove when the cam operation unit 182 is moved with respect to the rotating body 50.

(Variation 2 of the cam operation unit)
Next, Modification Example 2 of the cam operation unit 82 of the cam mechanism 80a provided in the pump device 1 according to the first embodiment of the present invention will be described. FIG. 8B is a diagram illustrating a second modification of the cam operation unit 82 of the cam mechanism 80a included in the pump device 1 according to the first embodiment of the present invention. The cam operation unit 182a shown in FIG. 8B is different from the long hole 182 of the cam operation unit 182 in the shape of the long hole 183a. That is, the long hole 183a has one parallel portion A (scanning direction extending portion) extending in parallel with the operation direction of the cam operation portion 182a, and an intersection extending in a direction intersecting with the operation direction of the cam operation portion 182a. Two parts B are formed. Two stepped portions 184a are provided on the outer peripheral side of the long hole 183 in the extending direction. In the cam operation unit 182a, a groove 185a formed at the center in the longitudinal direction of the cam operation unit 182a is a slide groove when the cam operation unit 182 is moved with respect to the rotating body 50.

  Also in the cam operation unit 182a configured as described above, when the protrusion 81 is arranged in the parallel part A extending in parallel with the operation direction of the cam operation unit 182a, the cam operation unit 182 is similar to the cam operation unit 182. There is an effect. In the cam operation unit 182a, the position of the roller 75 can be changed in three stages.

  That is, in the cam operation part in which a long hole extending in a direction intersecting with the operation direction of the cam operation part is formed, an operation direction extension that extends in the same direction as the operation direction of the cam operation part at least in the middle of the long hole By forming the portion, the position of the roller can be adjusted stepwise.

(Modification 3 of the cam operation unit)
Next, Modification 3 of the cam operation unit 82 of the cam mechanism 80a provided in the pump device 1 according to the first embodiment of the present invention will be described. FIG. 9 is a diagram showing a third modification of the cam operation portion 82 of the cam mechanism 80a provided in the pump device 1 according to the first embodiment of the present invention.

  As shown in FIG. 9, the two long holes 283 of the cam operation unit 282 extend in a direction in which the extending directions of the long holes intersect each other, and are formed at intervals. That is, the long hole 283 is divided into two with respect to the long hole 83 described above. In this case, the protruding portion 81 formed on the surface side of the bottom portion 60 may be provided so as to correspond to the position of the long hole 283 of the cam operation portion 282. In the case of the cam operation portion 82 described above, two protrusions 81 are disposed in one elongated hole 83. In the case of the cam operation portion 282, one protrusion 81 is disposed in each of the elongated holes 283. Is done.

Even when the cam operation part 282 in which the long hole 283 is formed is used, the same effect as the cam operation part 82 is obtained.
In the cam operation unit 282, a groove 285 formed at the center in the longitudinal direction of the cam operation unit 282 is a slide groove when the cam operation unit 282 is moved with respect to the rotating body.

(Modification 1 of cam mechanism)
Next, Modification Example 1 of the cam mechanism 80a included in the pump device 1 according to the first embodiment of the present invention will be described. FIG. 10 is a diagram illustrating a first modification of the cam mechanism 80a included in the pump device 1 according to the first embodiment of the present invention. In addition, about the thing of the same structure as the above-mentioned 1st Embodiment, the same code | symbol is attached | subjected and described, and detailed description is abbreviate | omitted.

  The cam mechanism 380a includes a protruding portion 381, a cam operation portion 382, and a fine adjustment mechanism 386. The fine adjustment mechanism 386 is a rack and pinion. A rack gear 387 is formed on the side surface of the cam operation portion 382, and a pinion gear 388 is disposed on the surface side of the bottom portion 60 so as to mesh with the rack gear 387.

  In the cam operation portion 82 described above, the elongated hole 83 is bent in the extending direction, but as shown in FIG. 10, the elongated hole 383 of the cam operating portion 382 extends linearly in the extending direction. When the long hole is formed in a straight line in this way, the position of the roller 75 can be adjusted steplessly by stopping the protrusion 381 at a desired position in the extending direction of the long hole 383. is there. Then, by rotating the pinion gear 388, the cam operation unit 382 can be moved by a predetermined distance, and the roller 75 can be finely adjusted to a predetermined position with higher accuracy.

  FIG. 11 is a schematic diagram illustrating an operation when the cam operation unit 382 is moved in the first modification of the cam mechanism 80a included in the pump device 1 according to the first embodiment of the present invention. In the cam mechanism 380a, the roller 75 can be adjusted to a desired position as shown in FIG. 11 by rotating the pinion gear 388 and moving the cam operation unit 382 to a predetermined position.

(Second Embodiment)
Next, a rotor 440 according to a second embodiment of the present invention will be described. FIG. 12 is a conceptual explanatory view showing a rotor 440 according to the second embodiment of the present invention. The second embodiment shows a form that can be applied when three or more rollers are used.

  The rotor 440 includes three bottom portions 460, rollers 475, and a cam mechanism 480a that are sequentially arranged around the rotation shaft 421. The cam mechanism 480a includes a protrusion 481 and a cam operation unit 482.

The cam operation portion 482 has a disk shape, and the cam operation portion 482 is formed with three elongated holes 483 positioned on the respective bottom portions 460. A protrusion 481 is formed on the bottom portion 460, and the protrusion 481 is fitted in the elongated hole 483. The protrusion 481 is guided in the long hole 483. That is, the cam mechanism 480a is a rotating cam mechanism, and an elongated hole 483 is formed in a direction crossing the rotation direction.
In the rotor 440 according to the second embodiment configured as described above, by rotating the cam operation portion 482, the position of the bottom portion 460 moves in the radial direction of the rotation of the cam operation portion 482, and the roller 475. Can be adjusted.

(Modification 1 of 2nd Embodiment)
Next, Modification 1 of the second embodiment will be described. FIG. 13 is a conceptual explanatory view showing a second modification of the rotor 440 according to the second embodiment of the present invention. In addition, about the thing of the structure similar to the above-mentioned 2nd Embodiment, the same code | symbol is attached | subjected and described, and detailed description is abbreviate | omitted.

As shown in FIG. 13, the rotor 540 is different from the rotor 440 described above in that the shape of the long hole 583 of the cam operation unit 582 is different. That is, the long hole 583 of the cam operation unit 582 is formed in a curved shape in a direction intersecting with the rotation direction of the cam operation unit 582. Even in the rotor 540 having such a configuration, the position of the roller 475 can be adjusted by moving the position of the bottom portion 460 in the radial direction of the rotation of the cam operation portion 582 by rotating the cam operation portion 582. it can. In addition, since the elongated hole 583 is formed in a curved shape, the protrusion 481 can be guided more smoothly, and the cam operation portion 582 can be rotated more smoothly.
In addition, about 2nd Embodiment and each modification, in the structure common to 1st Embodiment mentioned above, the effect equivalent to 1st Embodiment can be acquired.

  Note that the present invention is not limited to the above embodiment. What was comprised combining each component mentioned above suitably is also contained in this invention. Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.

  In the above embodiment, the case where the long hole formed in the cam operation portion is a through-hole is illustrated, but it may be a hole that does not penetrate, and the long hole that does not penetrate guides the protrusion. It may be configured to.

1 Pump device 10 Motor 20 Reducer 21 Rotating shaft (Output shaft)
30 Housing 30a Inner peripheral wall surface 30b Recess 31 Tube 40, 440, 540 Rotor 50 Rotating body 51 Holding part 52 Plate member 53, 54 Long hole 55 Fixed part 56 Peripheral wall part 58 Screw 60, 460 Bottom part 61, 62 Screw hole 63 convex portion 64 groove portion 70, 470 arm portion 71 arm portion main body 72 slot 73 convex portion 75, 475 roller 76 tube guide 77 manual rotation operation lever 79 screw 80 position adjusting means 80a, 380a, 480a cam mechanism 81, 381, 481 Projection portion 82, 182, 182a, 282, 382, 482, 582 Cam operation portion 83, 183, 183a, 283, 383, 483, 583 Long hole 85 Slide groove 86 Screw 90 Elastic member 95 Guide means 96 Bearing 184, 184a Step Portions 185, 185a, 285 Groove 386 Fine adjustment mechanism 38 7 Rack gear 388 Pinion gear A Parallel part (operating direction extension part)
B intersection

Claims (11)

A rotor for delivering liquid in the tube by pressing the tube,
A rotating body that rotates around a rotation axis;
A plurality of bottom portions attached to the rotating body;
A plurality of arm portions each having a roller that revolves around the rotation axis and presses the tube, and is attached to each of the plurality of bottom portions;
Position adjusting means for adjusting the mutual positional relationship of the plurality of bottom portions in the radial direction of rotation of the rotating body;
With
The rotor, wherein the position adjusting means includes a cam mechanism that can define a plurality of positional relationships in the plurality of bottom portions.   The rotor according to claim 1, wherein the position adjusting unit adjusts a distance from the bottom portion to the rotating shaft in the bottom portion. The plurality of bottom portions are arranged around the rotation axis,
The cam mechanism includes a protrusion provided on each of the plurality of bottom portions, and a cam operation portion that can move relative to the bottom portion.
The cam operation part is formed with a long hole extending in a direction intersecting with the operation direction of the cam operation part. The protrusion is fitted into the long hole, and the protrusion is guided into the long hole. The rotor according to claim 1, wherein:   4. The rotor according to claim 3, wherein in the cam mechanism, at least one operation direction extending portion that extends along an operation direction of the cam operation portion is formed in the elongated hole.   4. The rotor according to claim 3, wherein in the cam mechanism, the position of the protrusion guided in the elongated hole can be adjusted steplessly. 5.   The rotor according to claim 5, further comprising a fine adjustment mechanism that finely adjusts a position of the cam operation unit. The rotor according to any one of claims 1 6, characterized in that the rollers are arranged in rotational symmetrical positions with respect to the rotation axis. The rotor according to any one of claims 1 to 7 , wherein the two bottom portions are disposed to face each other with the rotation shaft interposed therebetween. The rotor according to any one of claims 1 to 8, characterized in that it comprises biasing means for biasing said roller radially outward of the rotation of the rotating body. The rotor according to any one of claims 1 to 9 , further comprising guide means that enables relative movement of the arm portion with respect to the bottom portion. A pump device comprising: a housing that accommodates the rotor and the tube; a rotor according to any one of claims 1 to 10 ; and a motor that is a driving source of rotation of the rotor.

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